Boat propeller



J. J. ANDERSON 1,738,134

son' PROPELLER Filed April 6, 1929 2 sheets-snee: 1.

, l 2O n LLI! IN ENTOR BYJUH/V J 4A/0EQS0N ATTOREY Dec. 3, 1929. .1.J.ANQERSON 1,733,134

` BOAT PRQPELLEH Filgd April 6, 1929 ZKSheets-Sheet 2 Il@ i v INVENTORBYJ'oH/v JA @ganso/V ATTORNEY FHN J'. ANDERSON, OF MINNEAPLXS, MNNESOTABlfll ltUlI-ELLER Application filed .april 6, 19%. Serial No. 353,102.

This invention relates to boat propellers, ci' the traine B is secured apair ci laterally and the primary object is to provide a simdisposedstandards 12 which rigidly support pleMJ cilicient, and practicalmechanism tor a cross bar 153 having` lng` projections 14 at itspropellinpr water cralt that will utilize a en is. rlhese lugs 1K1 serveas bearings 'for a s niairiinrnn anionnt et power 'troni the engineshail'ft l5 having cranlrs 16 and 17 at its outer 55 or other powerunit? that will operate ellecein rthese cranks, in the present instance,tively regardless ci the shallowness or the are provided. with pitmanbars 18 which water, that will not become clogged by weeds transmitpower to the sha'lit 15 -lfroin the enol damaged by rocks, and, byexerting` a diaine or power unit (not shown) ot the boat,

io rect push or action against the water and by in the nsnal manner, butit is to be under- 6G snbnrergingv in and emerging troni the water stoodthat any desired mechanism may be in substantially vertical directionswill not employed tor rotating the shaft 15. The eirert wasted energy ormeet with nnnecesouter ends oit the cranks 16 and 17 are consaryresistanceT as in the oase et water wheels nected by linlr bars 19 and20, the lower it now largely employed :tor this purpose. rear ends etwhich are pivotally connected 65 lllnrther and more specilic objectswill be to blocks 2l, cach et which is slidably mount- -disclosed in thecourse or the following speci ed on a pair ot parallel race bars 22.Each lication, reiterence beinghad to the accoinset or race bars 02 isanchored at its forward panying;` drawings, wherein: end in a dependingbracket 23 at the end of ad llli 1 is a side elevation oil the mechanismthe bar 10 and the rear ends of the race bars showing` it as applied 'tothe rear end oli' a 29; are anchored in posts Q-l extending downboat andsh wingl one ot the propelling padwardly trom the rear end of the YframeB. dles in a position emerging from the water, Thus, the two sets etrace bars 22 are firmly while the other paddle is in a position readyheld in inclined, parallel and rigid condiea' to be submerged in thewater. tions. 75

2 is a plan view ot the mechanism Jonrnaled in the blocks 21 are a pairof shown in Fia. 1u but with fractional portions rank bars 25 which areprovided at their broken away vfor purpose ol illustration. rear endswith rigid transversely disposed Fig. 3 is an enlarged detail view,partly paddles 26 and E37. Vlhe forward or crank 3o in sectionn showinglthe connection between ends oi" the bars 25 are onrnaled in sleeves 28U0 the linlr bars and the paddle bars. (see lTipg. 3) carried by theblocks 21, but at Fin. l is a side elevation similar to Fig. 1, theirouter ends these cranlrs are non-rotatbut showing the paddles inadvanced posiably secured to the rear ends of the link tions. bars 18and 19. Thus, when the link bars es 5 is a rear view oi the propelling18 or19 successively move upward and clown- 85 mechanism., ward thepaddles 26 and 27 will be succeslteiterring to the vdrawingigs moreparticnsively moved downward and upward7 and larly and by reiterencecharacters() it. desi gas the linlr bars move forward over the cennatesi boat which may be oit any sine or oonter ot the sha'tt 15 they willOperate the padstrnctioin and npon the reL r end oit which is dles 26and Q7 downwardly and rearwardly, 90 secured a 'traine @generallydesignated by the with a result that the paddles will move letter ll.Vlhis traine comprises a pair of rearwardly only when they aresubstantially side bars o and 'i9 connected at their rear below thewater level, and as soon as they ends by a cross bar 8, At its 'trentend the successively reach their rearinost positions i5 traine bars 6and 7 are connected by a cross they will be lilted and returned to theirtorebar 9, and at intermediate points the side most positions in asubstantially horizontal bars are connected by a cross bar 10 which pathabove the water level. in turn is braced by a pair of braces 11, seriChe inclined positions of the race bars 22 'cored at their outer endsadjacent the rear are so associated with respect to the power @il endset the bars t5 and 'l'. Upon. the trent end shalt 1li that they willfarther serve to ,give W0 the paddles 26 and 27 the proper operatingaction when in use.

From the foregoing description it will be obvious that by reversing thedirection of rotation of the shaft 15 the paddles 26 and 27 will o erateto pull the boat rearwardly throng the water.

It is understood that suitable modifications may be made in thestructure as disclosed, provided such modifications come within thespirit and scope of the appended claims.

Having now therefore fully illustrated and described my invention, whatI claim to be new and desire to protect by Letters Patent is:

l. A boat propelling mechanism comprising a pair of laterally disposedraces, blocks slidably carried by and on the races, a pair of paddleshaving shafts pivotally carried by the blocks, a pair of link barsattached to the paddle bars and for reciprocating the race blocks, eachof said paddle shafts being relatively rigid with respect to one of thelink bars.

v2. Alboat propelling mechanism comprising a pair of laterally disposedraces, blocks slidably carried by and on the races, a pair y -of paddleshaving shafts pivotally carried by the blocks, a pair of link barsrigidly connect-ed to the respective paddle bars and for reciprocatingthe race blocks, and a pair of crank arms for actuating the link bars.

y3. A boat propelling mechanism comprising a pair of laterally disposedraces, blocks slidably carried by and on the races, a pair of paddleshaving shafts pivotally carried by y the blocks, a pair of .link barsrigidly connected tothe respective paddle bars and for reciprocating therace blocks, a rotatable power shaft and `cranks on said shaft connectedwith Vthe link bars for actuating the latter.

4. A boat propelling mechanism compris- .ing a frame carried rearwardlyof the boat Vand having a pair of laterally disposed parallel races, apair of transversely disposed paddles each pivotally and slidablyassociated with one of the races, and continuously operative means foractuating the paddles withl respect to the races whereby they willsuccessively mov-e in an elliptical course rearwardly in a relativelylow course and forwardly in a relatively high course.

5. A'boat propelling vmechanism comprising a. frame carried rearwardlyof the boat and having a pair of laterally disposed inclined races,travellers carried by the races for alternate reciprocating movementsthereon, paddles pivotally carried by the travellers, and means foralternately reciprocating the travellers and successively raising andlowering the paddles.

6. A beat propelling mechanism comprising a frame carried rearwardly ofthe boat and 'having a pair of laterally disposed inclined races,travellers carried by the races for alternate reciprocating movementsthereon, paddles pivotally carried by the travellers, and means foralternately reciprocating the travel- 1ers and successively raising andlowering the paddles, said last mentioned means including a crank shaftand link connections extending therefrom to the travellers and paddlemembers.

7. A boat propelling mechanism comprising a frame carried rearwardly ofthe boat and having a pair of laterally disposed inclined races,travellers carried by the races for alternate reciprocating movementsthereon, a pair of transversely disposed paddles each carried by a barpivotally associated with one of the travellers, and means rigidlyconnected with the respective paddle bars for simultaneouslyreciprocating the travellers and oscillating the paddle bars.

8. Aboat propelling mechanism comprising a frame carried rearwardly ofthe boat and having a pair of laterally disposed inclined races,travellers carried by the races for alternate reciprocating movementsthereon, a pair of transversely disposed paddles each carried by a barpivotally associated with one of the travellers, a pair of link barsrigidly connected to the paddle bars, and rotatable means for actuatingthe link bars.

9. A boat propelling mechanism compris- 9o ing a frame carriedrearwardly of the boat and having a pair of laterally disposed races,travellers carried by the races for reciprocating movements thereon, apair of transversely disposed paddles having crank arms pivotallysecured to and carried by the travellers, a crank shaft journaledrearwardy in the frame, and link bars secured at their fore ends to thecranks of the crank shaft, and rigidly secured at their rear ends to thepaddle crank arms for actuating the latter.

Signed at Minneapolis, in the county of Hennepin and State of Minnesota,this 4th day of April 1929.

JOHN J. ANDERSON.

